/Engine/Source/Runtime/Experimental/FieldSystem/Source/FieldSystemEngine/Public/Field/FieldSystemObjects.h
Plane scalar field that will be defined only within a distance from a plane
[UPlaneFalloff](API\Runtime\FieldSystemEngine\Field\UPlaneFalloff) * SetPlaneFalloff ( float Magnitude, float MinRange, float MaxRange, float Default, float Distance, FVector Position, FVector Normal, EFieldFalloffType Falloff )